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Science 22 November 1985:
Vol. 230. no. 4728, pp. 937 - 940
DOI: 10.1126/science.230.4728.937
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Articles

Crystal Axes in Recent and Fossil Adult Echinoids Indicate Trophic Mode in Larval Development

RICHARD B. EMLET 1

1 Department of Zoology and Friday Harbor Laboratories, University of Washington, Seattle 98195

The type of larval development in echinoids (Phylum Echinodermata) was found to determine crystal patterns in adult apical skeletal plates. This relation between larvae and adults will allow fossil species to be examined to determine the effects of developmental mode on evolutionary patterns, such as species longevity and speciation rate. Independent tests of hypotheses of such patterns now shown among fossil mollusks with and without feeding larvae can thus be performed.

Submitted on May 31, 1985
Accepted on August 30, 1985


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
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